<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>事件修饰符</title>
    <script type="text/javascript" src="../js/vue.js"></script>
    <style>
        *{
            margin-top: 20px;
        }
        .demo1{
            height: 50px;
            background-color: skyblue;
        }
        .box1{
            padding: 5px;
            background-color: skyblue;
        }
        .box2{
            padding: 5px;
            background-color: orange;
        }
        .list{
            width: 200px;
            height: 200px;
            background-color: peru;
            overflow: auto;
        }
        li{
            height: 100px;
        }
    </style>
</head>
<body>
    <!-- 准备好一个容器 -->
        <div id="root">
        <h2>欢迎来到{{name}}</h2>
        <!-- prevent阻止默认事件 -->
        <a href="http://www.atguigu.com" @click.prevent="showInfo">点我提示信息</a>
        <!-- stop阻止事件冒泡 -->
        <div class="demo1" @click="showInfo">
            <button @click.stop="showInfo">点我提示信息</button>
        </div>
        <!-- once事件只触发一次 -->
        <button @click.once="showInfo">点我提示信息</button>
        <!-- capture使用事件的捕获模式 -->
        <div class="box1" @click.capture="showMsg(1)">
            div1
            <div class="box2" @click="showMsg(2)">
                div2
            </div>
        </div>

        <!-- 只有event.target是当前操作的元素时才触发事件 -->
        <div class="demo1" @click.self="showInfo">
            <button @click="showInfo">点我提示信息</button>
        </div>

        <!-- @scroll=“demo”滚动条滚动触发事件 -->
        <!-- @wheel="demo"鼠标滚轮滚动时触发事件 -->
        <!-- passive事件的默认行为立即执行，无需等待事件回调执行完毕： -->
        <ul @wheel.passive="demo" class="list">
            <li>1</li>
            <li>2</li>
            <li>3</li>
            <li>4</li>
        </ul>
    </div>
</body>
<script type="text/javascript">
Vue.config.productionTip=false

new Vue({
    el:'#root',
    data:{
        name:'尚硅谷'
    },
    methods:{
        showInfo(e){
            // e.stopPropagation()//阻止事件冒泡
            alert('同学你好！')
            // console.log(e.target)
        },
        showMsg(msg){
            // e.stopPropagation()//阻止事件冒泡
            console.log(msg);
        },
        demo(){
            for(let i=0;i<10000;i++){
                console.log('#')
            }
            console.log('累坏了')
        }
    }
})
</script>
</html>